Steam set-works for sawmill-carriages.



3 Sheets-Sheet I.

Patented Apr. 24, |900.

R. F. BAKKER & M. CBBY. STEAM SET WORKS FOB SWMILL CRRAGES.

` (Application med sept. 19, 1899.)

(No Modevl.)

YH: nonlls mns mv, Puomumcn. wAsmNuToN No. 648,333. i 4 Patented Apr. 24,1900. n. F. ARKl-:n 3 M. comw.

STEAM SVET WORKS FUR SAWMILL CABBIAGES.

(Application filed Sept. 19, 1899.) (No Model.) 1 3 Sheng-Sheet 2.

IQE- atentd Apr. 24, |900;

P R.' F.'BARKER & M. CDRRY. STEAM SET WORKS FUR SAWMILL CARRIAGES.

(Application led Sept. 19, 1.899.)

3 ShBetQ-Sheet 3.

(No Model.)

,4.) i@ lill Uniti-3D STATES PATENT FFIC.

F. BARKER AND MICHAEL CORRY, OFV MARINETTE, WISCONSIN;

STEAM SET-WORKS FoR sAwMlLL-CARRIAGES.

SPECIFICATION forming part of Letters Patent N o. 648,353, dated April 24, 1900.

Y Application ile-d September 19, 1899. Serial No. 751,006. (No model.)

.To ctlwhom it may con/cern.- l

Be it known that we, RUBEN F. BARKER and MICHAEL CORRY, citizens of the United States, residing at Marinette, in the county of Marinette and vState of Wisconsin, (whose post-oliice address is Menekau.ne,Wisconsin,) have invented certain new and useful Improvements in Steam Set-Works for Sawmill- Carriages; `and we do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable others skilled i-n the art to which it appertains to make and use the same.

Our invention relates to improvements in hand-controlled power-actuated set-works for sawmill-carriages; and the object is to provide means for quickly and accurately adj usting the set-works to cut boards of uniform thickness and for receding the knees of the head-blocks.

Our invention will be understood by referenceto the accompanying drawings, wherein the same parts are indicated by the same letters throughout the several views.

Figure l is a top plan View of a sawmillcarriage provided with our pressure-actuated set-works. Fig. 2 is a sectional view taken on the line 2 3 in Fig. l and looking in the direction of the arrow 2. Fig. 3 is a sectional view taken on the line 23 in Fig. l4 and looking in the direction of the arrow 3 in said figure. Fig. 4 is a sectional View taken on the line 4 A in Fig. 5 looking in the direction of the arrow. Fig. 5 is a sectional view taken on the line in Fig-1 and looking in the direction of the arrow 5. Fig. t' is an enlarged sectional view taken on the line 6.6 in Fig. 7 and looking in the direction of the arrow, showing the ratchet-and-pawl escapeinent whereby the worm-gear is locked upon the shaft; and Fig. 7 is a sectional view taken onv the line 7 7 in Fig. 6.

A A0 represent the head-blocks, mounted upon the sills X Xzptransversely of the carriage in the ordinary way. y

B represents the set-shaft, journaled in brackets b beneath the head-blocks A AO and provided with pairs of pinions b b and b2 h2, xed thereon adjacent to and upon opposite sides of the head-blocks A A0, respectively.

C C0 represent double rack-bars which fit over and are arranged to slide along the headblocks A A, the ilanges a a0 on the said headblocks engaging in corresponding grooves or slideways c co within the said rack-bars C C", respectively. These rack-bars have double sets of teeth c2 c3,with which engage the pairs of pinionsb and b2, respectively, onopposite sides of the said head-blocks A A0, as seen most clearly in Figs. 3 and 5. A

The double rack-bars C C0, whichinclose `the head-blocks A A0, carry the knees D D0,

the latter having oppositely-disposed flanges d do, en gagingin corresponding grooves c4 cin the upper portion of the rack-bars C C0, respectively, aud resting upon the transverse webs c6 c7, which rigidly connect the two members of the rack-bars, as seen most clearlyin Fig. 5.

The head-block A0 consists of a cylinder of a length equal to the travel of the knees and has its upper side formed of an exterior appearance and configuration similar to the head-block A. This steam-cylinder headblock A0 is provided with steam-passages a2 a3, connected midway of the length of the cylinder with a valve-chamber A3, provided with an exhaust-opening ctx and fitted with a sliding valve A4. This valve is under the control of the operator for admitting Isteam upon either sideof the piston, which may enter through a connecting-pipe A5 (shown in Fig. 3) by means of the pivoted hand-lever A6 and its connections. (Seen most clearly in Figs. 3, 4, and 5.) l

The cylinder-head block A0 is fitted with a piston A2, connected to a piston-rod A', which piston-rod is in turn connected to a rearward extension CX upon the double rack-bar C0, which straddles the cylinder-head block A0, as hereinbefore described.

The steam-pressure is constantly onwithin the valve-chamber A8 and is admitted to either side of the piston A2 by the proper manipulation of the hand-lever A, which actuates the valve A4 at the will of the operator. V

The piston A2 and its connecting-rod A' in their movement either forward or backward. at the will of the operator causes a corresponding equal movement of the rack-bar C, and this rack-bar, having its teeth c3 meshing with the pinions b2 on the set-shaft B, causes the rotation of the set-shaft, which in turn com- IOO ` 17s ate the knees only at intervalsand rtoa lim-l ited extent, dependent upon the thickness of` itshubkeyed in a iixed'position'upon the setn shaft and carrying withinV its concave face :E0

and the correspondingknees D0 andD, andv this pressure is maintained until the last board. has been sawed frornthe log anduntilfit is desired to recedethe knees to allow-a newlog` y to be placedupon the carriage.

pressure forward upon the knees, asabovje described, is controlled andl allowed to actuthe board to lbe sawed, by locking vdevices rconnected with the set-shaft, as hereinafter; described; f v i i l f Referring now more particularly to Figs'. 6

and 7, E 'represents a wheel or disk- `I iaving a series of spring-pressed -pivotedipawlsE2.

F represents a worm-gear which ,isA rigidly connected to a sleeve F', having a boss F2,

provided with peripheral ratchet-'teeth f2, the

boss F2011 the sleeve F iitting'wi-'thin the concavity E of the disk E and the vpawls E2 engaging theratchet-'teethf2 o n the said boss. The said sleeve F is mounted loosely upon the set-shaft B, and ratchet-teeth f2 and interlocking pawls E2 are so arranged and constructed that forward rotation of the set-shaft is prevented so vlong as the Worm-'gear Fis held against rotation but the said set-shaft, with the disk E and the pawls carriednthereby, may rotate freely under backward pressure upon the piston A2 within the cylinder v A", notwithstanding that the worm-gear F be held stationary during such backward movement. This arrangement is to allow the forward feed to be controlled by the operator, while the knees may be receded continuously and quickly by reversing the'pressure within the cylinder A0.

The worm-gear F is locked against Irotation by means of a pair of worms H and H', which mesh with the teeth upon the worm-gear F at opposite sidesof its periphery, as seen most clearly in Fig. 2. v l

The worms H and H' are mounted at one end in bearings therefor upon a bracket H2 and at their opposite ends in-suitablebear 4 ingsA upon the bracket H2.

v `Intermeshing toothed gears H4 and H5, fixed upon the shafts 'of the worms H and H', respectively, allow the said worms `to be rotated in unison, and a pinion H6, mounted upon the shaft of one of the Worms H, 'meshes with a larger gear H7,

mounted upon a shaft journaled transversely of 4thebracket H2, upon one end of which shaft is also mounted a hand-wheel H8 for rotating said shaft, and with it the gear H7 and the train ofgears-connecting the latter with the worms H and H', through the rotationl of y tate.

This Constant' which the worm-'gear F'may be caused to roL The worms H and H' may be rotated continuously through the train or gears herenew-.boardthere must be some varrangement *for rotating this train of gearswith uniformity. For this purpose.Wecp'rovide a rocking lever H2, which islooselymounted4 upon the axis of y'the gear H7 and vthe lhand-wheel HS,

by means of whicha predetermineddegree of rotation may be given `to the train .of gears veach tiniethe logis to beset up forsawing a `new bboard. Thisrockin g lever' H9 works in Aconjunctionwith a "fixed segmental Ibar or 1 quadrant-H0, provided withfa series of openings h"v for receiving a stop-.pin 1h', adjustable for varying the degree of throw allowed to the lever H2 Vandthe "consequent ,degree of rotation tobe-impartedto the trainrof-gears. VThis segmentalbar HQisprovided atome end iwjtha fixed stop -h2,'whioh`arrests the for- -ward movement of 'the rocking ,lever-Has y the adjustable `stop h' lim'itsfjthek backward movement thereof, as will bey clearly 'un'derstood'by any on'eskilledin the art. A'ratchet- -wheelh2-is fixed upon lthe 'shaft `of 'the gear H7, and the rock-ing ilever HQcaI-riesa pawl h4, arranged to engage theV teeth of .the :said ratchet-wheel as the said klever is thrown over to the right orforward-fposi'tion. jThusas the rocking lever H9 is thrown over to jtherleft or backward position, it movessuccessivelyover the teeth of. the said ratchet-wheel until arrested by the adjustable stop h', and then upon the said lever being thrown to the right or vforward position thepawl h4, vengaging the ratchet-teeth of the wheel h3, causes apartial rot-ation of the-said ratchet-wheeland its connecting train of gearshereinbefore-described.

yThe forward rotation of the Iset-shaft is by meansfo'f the train of gears and the rocking lever above described placed entirely within the controlof the Sawyer for setting up the knees uniformly the desired distance. When it is desired to recede the knees, the sawyer reverses his valve-lever AG-Vthat is tosay, he throws it to the right, or backward as'seen in Figs. 3 and {Lfadmitting steam-pressure in front of the piston A2 and allowing'the pressure in thev rear thereof to exhaust through the exhaust-passage ax inthe valve-chamber. Inasrnuch as the set-shaft kisjfree to rotate `backwardly, the knees may be receded instantly by this simple backward pull upon `the valve-lever A6, as above described.

inbefore -described by means of the hand- -wheel,H2; butin setting up the log for each roo In' ordinary head-blocks for lsawm'ill-carrages there are commonly two modes of constructing them, one of whichconsists in providing a hand mechanism with 'a locking device for adjusting each knee independently of thesetting mechanism, in order to accommodate tapering logs," and by means -of the hand-lever any required jknee may be moved forward outfof lits lnormal position a rlimited distance, but commonly as far as the taper of the logs demands, afterl which theknee is drawn back to its normal position by said hand-lever.

' knee can be adjusted to a tapering log by the hand-lever and at the same time maintain its connection with the setting-racks for regular work. The other mode of constructing headblocks is to omit altogether taper-setting mechanisms, so called, and to provide merely a base having the sliding knee mounted thereon, the setting-racksv being permanently secured to the knees, which are thereby directly actuated bythe setting-pinions.

Now it will be seen that the set-works shown and described in this application specilically relate to the former mode of construction, as the knees are independently mounted in the rack-bars, as clearly shown in Fig. 5, and are adj ustably connected thereto by the hand-lever I or IO and links I' or I2, as shown in Figs. 3 and 4, while the power derived from the cylinders is applied directly to the rack-bars C or C(J to move the knees forward or recede them. It is not our intention, however, to limit our invention in this respect to the precise form of construction herein set forth, because it is equally as applicable to knees having the rack-bars .permanently fixed thereto and which have no action independent of the rack-bars. Therefore we broadly claim the method of operating head-block knees herein set forth,whether applied to head-blocks with adjustable knees for tapering logs or to those having no such adjustment. We do not wish to be understood as claiming the hand-lever mechanismfor taper-setting as herein shown and described, for that is old; but what we do claim in our invention is its adaptability to receive any approved form of taper-setting mechanism whereby the knees may have'a limited movement independent of the setting-racks, and we have shown herein one method of applying such a mechanism. lire observe, further, that the precise construction of our invention shown herein limits the employment of a power-cylinder to one head-block, from which power is distributed not onlyl to the knee mounted directly thereupon, but also to all the knees of all other head-blocks on a sawmill-carriage. Obviously in cases where a number of head-blocks are located upon a long carriage for long logs it is desirable to employ two or more head-blockswith powercylinders therein. We do not wish, therefore, to limit our claim to one cylinder only, but, on the contrary, to broadly claim their embodiment in one or more head-blocks on carriages of sawmills. The knee may also be locked in its independently-adjusted position by means of a taper-pin I4, carried by a pivoted hand-lever I5, passing through a lug D6 on the knee and arranged to engage in an opening in the upper side of the-corresponding rack-bar, as seen most clearly in The hand-lever I5 may be supported in position to hold the said taper-pin out of engagement by means of a notched bar I6, if desired, although this is not essential.

It should be understood that we do not limit ourselves to the embodiment of the actuating-cylinder and piston with but one of the head-blocks, as in the case of a sawmillcarriage having a number of knees greater than two or three two or more of the headblocks would be formed as power-cylinders,

and it maybe preferred toform power-cylinders in both head-blocks of a carriage having but two knees; but as these variations would involve merely a duplication of parts herein shown and described they will be readily understood without further specific illustration .ordescription Having thus described our invention, what we claim, and desire to secure by Letters Patent of the United States, is-

l. In sawmill set-works, the combination with set-shaft having pinions thereon; headblocks; rack-bars carrying the knees mounted upon said head-blocks and pinions on said shaft meshing with said rack-bars of a steamcylinder formed within one of the head-blocks a piston workin g in said cylinder connected to one of said rack-bars; means for controlling the pressure within said cylinder and means for controlling the movement of the set-shaft, substantially as described.

2. In power set-works forsawmill-carriages, the combination with the set-shaft; pinions thereon; rack-bars having teeth meshing with pinions on said shaft, and carrying the knees; of one or more power-cylinders mounted transversely of the carriage and each constituting one of the head-blocks, and supportinga rackbar and its knee; a piston in each cylinder; a piston-rod connected to each of said pistons and connected directly to the corresponding rack-bar; and means for controlling the pressure within each of said cylinders, substantially as described.

3. In power set-works for sawmill-carriages, the combination with the set-shaft; a disk fixed thereon, and pivoted pawls carried by said disk; of a worm-gear mounted loosely upon said set-shaft and having a concentric extension provided with ratchet-teeth in engagement with said pawls; said ratchet-and- -pawl mechanism allowing free backward turning of the said set-shaft while said wormgear is stationary, but arresting the forward rotation thereof; and worms meshing with said worm-gear and under the control of the operator for regulating the forward movement of the knees, substantially as described.

4. In sawmill set-works, the combination with the set-shaft having pinions thereon;

ICO

IIO

head-biociis ;fdonbie rack-bars Inoiini'sed over 'said head-blocks and meshing with said pinions', said mok-bars haVingVhead-blociks 'therein and .being movable along said headbloeks; and `knees mounted upon-said rack bars; of*ai;poWer-Cylinderf one or more arrangedv orzun'svenselyv of *the` ear'riaige'g'v` a'pisto'n working therein, che .piston-rodbeing` oonnected to' said rack-bars, and means 'foi' 2id-i mitting pressure to either' end of said cylinder?-v` substantially as described.

5. In sawmill set-works,

saidhead-blocks'and engagingsaid pinions;

i theoonulbin'eition i Withthe set-shaft; pinions mountedl thereon; head-bloeksgdouble rack-barsfmonn-ted over M. *01. "KOHLER: v 

